Research Information System
5th International Conference on Engineering Sciences, Ankara, Turkey, 17 - 19 September 2019, pp.1-8
In the present paper, implementation of DC motor driver
based on dsPIC30f series microcontrollers for speed control of DC motor has
been investigated. The H bridge circuit is designed for driving DC motor,
controlling the DC motor speed and the rotating side. The H bridge driver
circuit created with MOSFETs and controlled with 1 kHz PWM signal. Motor speed
is adjusted directly with PWM signal duty cycle. While changing duty cycle of
PWM signal the motor terminal voltage also changed by means of duty raito. In
addition to the previous studies which are related to the DC motor speed
estimation. The study has originality in detecting the DC motor speed using a
recomended sensorless method. The sensorless methods can be gathered into two
main topics which are based on the dynamic model, and based on the ripple
component. This paper proposes a technique that measures the back EMF (electro
motor force) voltage value of brushed DC motors and determine the speed of DC
motors. Any sensor or encoder is not used to determine the speed rate. Also,
the designed DC motor driver is robust about high power application andshort
circuit events. The DC motor can be protected in short circuit conditions by
means of using current sensor.